m00dawg Posted March 4, 2013 Report Share Posted March 4, 2013 After sitting for a few years, I decided to try and resurrect my MB6582 yesterday. I spent basically all day rewiring the CS and baseboard back together, which included having to work around lifted solder pads and got it /almost/ complete. A strip of LEDs on the matrix aren't working, but that's fixable. What is more difficult now is that two of the four screws the hold the panel to the top of the case popped off, so now that panel off the top. Anyone have thoughts on how to fix that? I can try to re-JB it, but with the CS already connected to the baseboard, that's going to be prove tough. So I was thinking of drilling screw holes on the panel but I don't think I can do that with extreme accuracy. One of the reasons the panel sits so high is that the cabling I got (from DigiKey) is just a bit too long and also rigid. It's what caused me so many issues the last time, but I have cabled it up a bit different this time around and I'm hoping that will put less stress on the joints. Either way, it looks a bit silly with the panel sitting up off the case so much :) Another problem is that, while it boots up saying "MIOS version...." when it gets to the main SID screen, the display goes all garbled. Sometimes it will get fixed by playing around with the panel. I think it's the 4-bit vs 8-bit mode thing perhaps but I don't know exactly how to fix that either? Thoughts? Quote Link to comment Share on other sites More sharing options...
TK. Posted March 4, 2013 Report Share Posted March 4, 2013 Sometimes it will get fixed by playing around with the panel. Sounds more like a connection issue Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
m00dawg Posted March 4, 2013 Author Report Share Posted March 4, 2013 I thought that too, but why does the MIOS boot screen always come up in cleartext? The screen repeatedly gets garbled after that screen (like when it's starting up the SID app). I seem to remember there being something significant with the LCD between those steps but I can't remember what it is. Quote Link to comment Share on other sites More sharing options...
TK. Posted March 4, 2013 Report Share Posted March 4, 2013 The bootscreen already uses 4bit mode. There shouldn't something significant different thereafter - ok, the LCD will be overwritten frequently. Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
m00dawg Posted March 4, 2013 Author Report Share Posted March 4, 2013 Ah perhaps it's the speed of updates or something then? Hmm...I can bust that LCD test program to see what that does and go from there. The unlit LED strip will be easy to fix (I know it's a short since I can put the panel in a configuration that it'll work)...the panel...eek that's going to be harder to solve, I fear. Quote Link to comment Share on other sites More sharing options...
TK. Posted March 4, 2013 Report Share Posted March 4, 2013 You could also use the MIDIO128 app to test this. Each received MIDI note will write to the LCD, so you can control the "update rate" by yourself (just play some notes on the virtual keyboard of MIOS Studio). Alternatively: I just noticed that the MBSID application includes an alternative LCD driver (app_lcd) which is enabled by setting the LCD section of the PIC ID header to 7. It can also be set by software from USER_Init: clrf MIOS_PARAMETER1 clrf MIOS_PARAMETER2 movlw 0x07 call MIOS_LCD_TypeSet With this driver, the LCD can be used in 8 bit mode. Pin D2 and D3 are available at PIC Pins RE1 and RE2; see also http://svnmios.midibox.org/filedetails.php?repname=svn.mios&path=%2Ftrunk%2Fapps%2Fsynthesizers%2Fmidibox_sid_v2%2Fsrc%2Fapp_lcd.inc Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
m00dawg Posted March 5, 2013 Author Report Share Posted March 5, 2013 Aha good idea! I'll give that a go, thanks TK! Quote Link to comment Share on other sites More sharing options...
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